The time option of cloud is giving only rough time to have time in logs at least somehow sensible (eg. year and month). If you configured SNTP client, then disable cloud update time:
/ip cloud set update-time=no
and preferably set timezone manually to whatever appropriate (Europe/Madrid) as well.
It had been mentioned that if SNTP client is properly configured, then clout time sync is automatically disabled, but that might not be so …
That’s assuming you really have SNTP set up (in /ip ntp client).